What is an Environmental Product Declaration (EPD)?

An Environmental Product Declaration — EPD — presents the environmental impact a product creates across its life cycle, in a standard format and independently verified. Put simply: the environmental equivalent of a food product’s nutrition table.

There is no passing grade

This is the most common misunderstanding. An EPD is not an ecolabel; it does not say the product is ‘environmentally friendly’ or certify that it clears any threshold. In ISO 14025 terms it is a Type III declaration: it presents quantified data and leaves interpretation to the reader.

Type I labels (the EU Ecolabel, for instance) work on pass-or-fail criteria. Type II is a self-declared claim requiring no verification. Type III is the most demanding and the most credible: the numbers are put on the table, audited by a third party.

What is inside one

• Declared unit — the quantity the results refer to (1 m², 1 m³, 1 tonne, 1000 pieces)
• System boundary — which life cycle modules are covered (A1-A3, A4-A5, B, C, D)
• Impact indicators — GWP, acidification, eutrophication, ozone depletion and others, by module
• Resource use — energy, water, primary and secondary materials
• Waste and output flows — hazardous and non-hazardous waste, material to recycling
• Reference service life — the assumption about how long the product lasts
• Data quality, verifier details and validity date

No PCR, no EPD

For two manufacturers’ EPDs of the same product to be comparable, both must be calculated on the same assumptions. Product category rules (PCR) enforce that: they fix the functional unit, system boundary, cut-off rules, scenarios and indicators to report.

The consequence: two EPDs prepared under different PCRs are not comparable. That warning is printed on most EPD cover pages and is routinely ignored.

How one is published

An EPD is published by an accredited program operator, which does three things: develops or approves the PCR, accredits verifiers, and publishes the declaration publicly. In Europe the main operators are ITB, IBU, EPD International and ECOnsult; which you choose determines which market recognises you.

Why buyers ask for one

An EPD is shifting from marketing asset to pre-qualification requirement. Green building schemes such as LEED, BREEAM and DGNB tie materials credits directly to EPDs. Public tenders and large private projects make one a condition of bidding. Corporate buyers collect EPDs from suppliers for their own Scope 3 accounts.